Phoenix, AZ · $685K
Pool + fully furnished
Year-1 federal benefit
$58,200
Short-Term Rental (Airbnb / VRBO)
STR cost segregation: $20K–$80K Year-1 deductions.
Material participation + furnished interiors = the most powerful Year-1 setup in real estate.
The 30-second answer
Short-term rental cost segregation is an engineering-based study that reclassifies a furnished Airbnb or VRBO property's components into faster depreciation classes. It fits STR owners who materially participate, because an average guest stay of 7 days or less keeps the activity out of passive treatment under §469. That matters because the resulting Year-1 deduction can offset W-2 and other active income.
STR cost segregation reclassifies 20–28% of depreciable basis from the 27.5- or 39-year shell into 5-, 7-, and 15-year MACRS classes per 26 U.S.C. § 168 and Rev. Proc. 87-56. Under OBBBA's permanent 100% bonus depreciation (placed-in-service 2025+), reclassified components are deductible in year one. All credible cost-seg providers use the same federal framework — RSMeans 2026 cost data, MACRS classification, IRS Audit Techniques Guide (Pub 5653) compliance. What differs across property types is land-allocation share, FF&E weight, and material-participation eligibility under §469.
| Property type | Reclass to 5/7/15-yr | Year-1 federal benefit | Study cost |
|---|---|---|---|
| STR this page | 20–28% | $20K–$80K | From $495 |
| SFR | 16–22% | $15K–$50K | From $495 |
| Condo | 14–18% | $10K–$35K | $495–$1,495 |
| Duplex | 20–25% | $18K–$55K | $995–$1,995 |
| Fourplex | 22–26% | $30K–$90K | $995–$1,995 |
| Office | 25–32% | $40K–$150K | $995–$2,995 |
| Retail | 26–32% | $50K–$180K | $995–$2,995 |
| Industrial | 16–24% | $30K–$120K | $995–$2,995 |
| Medical office | 30–38% | $60K–$220K | $995–$2,995 |
| Mixed-use | 24–30% | $45K–$200K | $995–$2,995 |
| Multifamily | 22–26% | $25K–$80K | $995–$1,995 |
| Multifamily 5+ | 24–30% | $60K–$300K | $995–$2,995 |
| Triplex | 22–25% | $22K–$70K | $995–$1,995 |
| Restaurant | 32–40% | $80K–$280K | $995–$2,995 |
| ADU | 20–28% | $8K–$30K | $495–$995 |
| Commercial | 22–32% | $40K–$200K | $995–$2,995 |
| Data center | 45–60% | $600K–$3.4M | $4,995–$29,995 sub-$25M; hyperscale from $49,995 |
Reclassification ranges from internal benchmarks across 4,000+ studies; Year-1 federal benefit assumes 37% bracket and full first-year usability. Study costs are Cost Seg Smart pricing — comparable engineering studies elsewhere range $5,000–$15,000+. See full provider comparison.
Real examples
What str cost seg looks like in practice.
Estimates assume 37% federal bracket and full first-year usability of the loss (active income offset or REPS). Your actual benefit varies with bracket, basis allocation, and CPA's treatment.
Good fit when…
- ✓Airbnb / VRBO operators meeting the material participation 100-hour or 500-hour test
- ✓Furnished short-term rentals (FF&E weight tilts the math toward 5-yr property)
- ✓Owners with W-2 or other active income to offset
Skip it when…
- ×Pure long-term rentals where you don't materially participate (losses get suspended)
- ×Owners in the 12% or 22% bracket — the cash benefit gets thin
Estimate
Run the numbers on your str.
Pre-set to STR defaults — adjust price + bracket to match your property.
Estimated Year-1 tax savings · Click to order →
$41,440
on $112,000 of accelerated deductions
Want this in writing for your CPA? Get a 1-page analysis →5-yr15-yr27.5/39-yr
Study cost
$895
ROI on study
46×
Delivery
< 1 hour
Estimate based on RSMeans 2026 cost data and IRC §168(k). Your actual result varies with property age, condition, and basis allocation.
Before you order
Make sure you're not leaving STR deductions on the table.
Free 1-page checklist of the deductions STR owners miss most often — material participation hours, furnishings reclass, the 7-day rule, and the lookback play.
Reading the regulation itself? See the §1.469-1T(e)(3)(ii)(A) reference — verbatim text, the six exceptions, and the material participation interaction.
Complete guide
The complete short-term rental cost segregation guide.
Everything an Airbnb or VRBO owner needs, by topic. Each guide goes deep on one piece of the short-term rental cost segregation strategy.
The 7-day rule
Material participation
W-2 income offset
Getting started
Why STRs reclassify high
Market data
Frequently asked
STR cost segregation, by question.
How does cost segregation actually help an Airbnb / STR owner?
It pulls a chunk of your property's basis — typically 20–28% — out of the 27.5-year residential bucket and into 5-, 7-, and 15-year MACRS classes. Combined with 100% bonus depreciation (permanently restored under OBBBA for 2025+), most of that reclassified amount becomes a Year-1 deduction. For a $500K furnished STR that's roughly $44K in federal tax savings at the 37% bracket. The IRS Audit Techniques Guide explicitly endorses engineering-based studies for residential rental property.
What is FF&E and why does it matter so much for STRs?
FF&E means Furniture, Fixtures & Equipment — the furnished components most STRs already have: beds, sofas, TVs, kitchenware, decor, smart locks, hot tubs, outdoor furniture. By default FF&E sits buried in the 27.5-year building basis. A study identifies it separately as 5-year property, which is fully bonus-eligible. STRs typically carry 6–10% more FF&E weight than long-term rentals, which is why their accelerated percentage is the highest of any residential type.
Can a cost segregation loss offset my W-2 income?
Only if you materially participate in the STR — the standard test is 100+ hours per year AND more than anyone else, or 500+ hours per year (IRS Publication 925). STR is one of the few real-estate activities where W-2 earners can clear that bar without quitting their day job (because the average rental period is ≤7 days, the activity isn't classified as a passive rental under §469). If you qualify, the accelerated depreciation reduces your taxable W-2 income directly. Confirm material participation with your CPA before assuming it.
What do I need to order a study?
Property address, purchase price, square footage, year built, and whether the unit is furnished. Closing statement and tax assessment improve accuracy but aren't required. The intake form takes about 5 minutes. We don't need a site visit — the engine uses RSMeans 2026 cost data, county assessor records, and satellite imagery to build the component schedule.
How fast is delivery?
Most studies are emailed back within an hour as a 40+ page IRS-defensible PDF. Your CPA gets the depreciation schedules, MACRS class breakdown, methodology section, and Form 3115 lookback narrative if applicable — formatted for direct use on Form 4562.
Will the IRS accept this?
Our methodology follows the IRS Cost Segregation Audit Techniques Guide (Publication 5653) and Revenue Procedure 87-56 for component classification. Every line item cites its asset class. We back the work with a CPA-Ready Guarantee — if your CPA can't file from the report, we refund the study fee. The deliverable is the same engineering-based study format larger firms produce; the difference is delivery time and price.
Regulation references
The rules that govern str cost segregation.
- The 75/55 rule (STR loophole) — the 7-day average rule under Treas. Reg. § 1.469-1T(e)(3)(ii)(A) that reclassifies short-term rentals from rental activity to non-rental trade or business, unlocking W-2 income offset without REPS.
- Real estate professional status (REPS) — the 750-hour and 51% tests under 26 U.S.C. § 469(c)(7), and the seven material participation tests under Treas. Reg. § 1.469-5T. Required to offset W-2 income with long-term rental losses unless the property qualifies under the STR loophole.
- Form 3115 (catch-up depreciation) — how to apply cost segregation to a property placed in service in a prior year. Full § 481(a) catch-up adjustment, automatic change-number 7, no IRS user fee.
- Treas. Reg. § 1.469-1T — full reference — all six (A)–(F) exceptions that reclassify a rental as non-rental for passive activity loss purposes.
- Regulations hub — full canonical reference for all cost segregation regulations.
- irsdepreciationrules.com — companion plain-language reference for the underlying IRS depreciation statutes (operated by Cost Seg Smart).